Bowling ball weight exchanger

Abstract

A bowling ball which has six weight receptacles arranged such that one receptacle is at the intersection of each of the mutually perpendicular X, Y, Z axes emanating from the center of the ball and the outer surface of the ball. A poly-vinyl-chloride cylinder lines each of the receptacles and inserts of predetermined weight can be inserted in various combinations into the receptacles. The weight receptacles are positioned in the ball such that one of the receptacles lies substantially equidistant from the finger holes of the bowling ball.

What is claimed: 
     
       1. An improved bowling ball for use in determining the most beneficial internal ball weight distributions for a particular bowler's style comprising: a bowling ball having mutually perpendicular x, y and z axes emanating outwardly from the center of the ball; and   at least six weight receptables, one at each of the intersections of said axes and the exterior surface of the bowling ball, each receptable containing an internally threaded cylinder secured to the inner surface of the receptacle and adapted to receive an insert of predetermined weight for creating various weight imbalances within the ball.   
     
     
       2. The invention of claim 1 wherein the ball has a plurality of finger holes and wherein one of the receptacles is located between the finger holes and is substantially equidistant from each of said holes.   
     
     
       3. The invention of claim 2 wherein each receptacle is one inch in diameter and one and one-sixteenth inches deep. 
     
     
       4. The invention of claim 3 wherein the cylinder is made of poly-vinyl-chloride. 
     
     
       5. A method for manufacturing a bowling ball which can be altered so as to have varying internal weight distributions comprising the following steps: drilling a plurality of weight receptacles into the ball, at least one receptacle being at each of the intersections of mutually perpendicular X, Y and Z axes emanating from the center of the ball, and the outer surface of the ball;   lining each receptacle with a reinforcing internally threaded cylinder; and   securing each cylinder to the inner surface of its receptacle.